tests/write4.c

   1 /*
   2  * Copyright (c) 2001, 2006 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <sys/types.h>
  41 #include <sys/stat.h>
  42 #include <fcntl.h>
  43 #include <unistd.h>
  44
  45 #include <kafs.h>
  46 #include <fs.h>
  47 #include <arlalib.h>
  48
  49 #include <roken.h>
  50 #include <err.h>
  51
  52 RCSID("$Id$");
  53
  54 #define BLOCK_SIZE      (256*1024)
  55 #define BUF_SIZE        1024
  56
  57 /*
  58  * write a sparse file, check that we get zeroes in the right places
  59  * and correct data where we've written.
  60  */
  61
  62 static void
  63 writeat(int fd, off_t offset, char *buf, size_t sz)
  64 {
  65     if (lseek(fd, offset, SEEK_SET) != offset)
  66         err(1, "lseek/w at %llu", (unsigned long long)offset);
  67
  68     if (write(fd, buf, sz) != sz)
  69         err(1, "write at %llu", (unsigned long long)offset);
  70 }
  71
  72 static void
  73 readat(int fd, off_t offset, char *buf, const char *data, size_t sz)
  74 {
  75     if (lseek(fd, offset, SEEK_SET) != offset)
  76         err(1, "lseek/r at %llu", (unsigned long long)offset);
  77
  78     if (read(fd, buf, sz) != sz)
  79         err(1, "read at %llu", (unsigned long long)offset);
  80
  81     if (memcmp(buf, data, sz)) {
  82         fprintf(stderr, "read %x, expected %x\n",
  83                 *(unsigned*)buf, *(unsigned*)data);
  84         errx(1, "memcmp at %llu", (unsigned long long)offset);
  85     }
  86 }
  87
  88 static void
  89 do_rw(const char *filename, int flushp)
  90 {
  91     int fd, ret;
  92
  93     char *databuf = malloc(BUF_SIZE);
  94     char *zerobuf = malloc(BUF_SIZE);
  95     char *scratch = malloc(BUF_SIZE);
  96
  97     if (!databuf || !zerobuf || !scratch)
  98         errx(1, "malloc failed");
  99
 100     memset(databuf, 0xe3, BUF_SIZE);
 101     memset(zerobuf, 0, BUF_SIZE);
 102
 103     fd = open(filename, O_RDWR | O_TRUNC | O_CREAT, 0666);
 104     if (fd < 0)
 105         err(1, "open %s", filename);
 106
 107     writeat(fd, 5 * BLOCK_SIZE, databuf, BUF_SIZE);
 108
 109     if (flushp) {
 110         if (close(fd) < 0)
 111             err(1, "close %s", filename);
 112
 113         ret = fs_flush(filename);
 114         if (ret)
 115             err(1, "flush %s", filename);
 116
 117         fd = open(filename, O_RDWR, 0666);
 118         if (fd < 0)
 119             err(1, "open %s", filename);
 120     }
 121
 122     writeat(fd, 9 * BLOCK_SIZE, databuf, BUF_SIZE);
 123
 124     readat(fd, 2 * BLOCK_SIZE, scratch, zerobuf, BUF_SIZE);
 125     readat(fd, 7 * BLOCK_SIZE, scratch, zerobuf, BUF_SIZE);
 126     readat(fd, 8 * BLOCK_SIZE, scratch, zerobuf, BUF_SIZE);
 127
 128     readat(fd, 5 * BLOCK_SIZE, scratch, databuf, BUF_SIZE);
 129     readat(fd, 9 * BLOCK_SIZE, scratch, databuf, BUF_SIZE);
 130
 131     if (close(fd) < 0)
 132         err(1, "close %s", filename);
 133
 134     if (unlink(filename) < 0)
 135         err(1, "unlink %s", filename);
 136
 137     free(databuf);
 138     free(zerobuf);
 139     free(scratch);
 140 }
 141
 142 static void
 143 doit(const char *filename)
 144 {
 145     do_rw(filename, 0);
 146     do_rw(filename, 1);
 147 }
 148
 149 int
 150 main(int argc, char **argv)
 151 {
 152     setprogname(argv[0]);
 153
 154 #ifdef KERBEROS
 155     if (!k_hasafs())
 156 #endif
 157         exit (1);
 158
 159     if (argc == 1)
 160         doit("foo");
 161     else if (argc == 2)
 162         doit(argv[1]);
 163     else
 164         errx(1, "usage: %s [filename]", argv[0]);
 165     return 0;
 166 }